Syringe



J. C. LOGAN SYRINGB Fl'ed April 12, 1920 Sept.y l5, 1925.

Patented Sept. 15,' 1925.

PATENT*OFFICE@ JAMES c. LOGAN, or earn GIRARDEAU, ivrrssoUnI; i

' SYRINGE. Y

npeiicatio'n' mea April 12, 1920.1 sdraiato, famosi...

To all whom t may ooncem y v- Y d Be it knownfthat L'JAMES C. LOGAN, avcitizen of the United States,`residing at the, city ofCape..'G'irardeau,` county'of Cape Girardeau, and State of Missouri,have 1nvented new and useful Improvements vln Syringes, of whiclrthefollowing-is a specilication` Y I This inventionV relates toimprovements1n syringes, and more particularlyV to a .selfmeasuring pressuresyringejadapted prima! rily for inoculation of hogs with anti-'hogcholera serum, but applicable Valso fory other purposes. d Y Y `Anobject of the 'invention is to provide a syringe whereby, throughlsupplyinga serum tothe syringe under'pressure, the syringe willoperateto inject measured quantities of the'serum. 1 V d Another objectrof' theinvention is to provide a syringe including a cylinder, a recip,rocating' pistonmounted inthecylinder, a

liquid supply passage, and an outlet passage with `means for controllingthe flow of the liquid through the syringe, wherebymeasured quantitiesthereof will be delivered to the outlet passage :for injection.

Additional features and advantages of the construction will be apparentfrom thev following detailed description taken in connection with theaccompanying y drawing, 1n which Fig. 1 is a plan view of the improvedsyringe. V

Fig. 2 is a side elevation.

Fig. 3 is a vertical section.

Figs. 4, 5 and 6 areV detailed views of the valve for controlling theflow j of liquid shown in the various operative positions.

In the embodiment of the invention shown in the drawing the syringe isillustrated as including a cylinder 1 preferably of glassl mounted in acylindrical metallic ho-using 2, the housing 2 having an opening 3exposing one side or' the cylinder. The housing 2 has oppositelydeveloped threaded portions 4 at' each end adapted to receive inthreaded engagement head pieces or caps 5.

In order to elfect a. tight joint between the ends of the cylinder 1 andthe head pieces or caps 5 gaskets 6 are interposed between the ends ofthe cylinder and flanges 7 formed integral with the caps 5. vThe headpieces or caps 5 have laterally extending curved."pipes` 8 thatbhafve.at'rtheir 'lends threaded portions'.,V A tube 10 equipped withcou'plingnuts 11 Aat' eacliv end is adapted to be"connected`with the ends of thepipes 8,

a tight' joint"'betweenv V'the i pipes k8 andthe Y tube 10 being.etl'ected by'i'nterposing rgaskets 12v between' the lrnatc'hir'ig endsthereof.:

.Substantifally intermediate the j length y of*y the tube 10 is a`Vvalvecasing 13 in which is `mounteda conicalvalve body 14. v A supply lpipe 15 extends into'the/ valve body' atVL a yninety degree angle inrespect of the tube 10, i `and afdischarge pipe 16 opening.dianaetrical-v lyopposite'- to the supply pipe vleads trom the valvecasing 13.. vThe-pipe r'15 is" ar-y ranged to receive a supplyofliquidfrom a `flexible conduitl 17, the liquid beingy sup#v plied to theconduit 17,'fromfa container by airpressure. The discharge passage 16'Yterininates in a needle support 18into which a hypo'der'mic needle '19'iscon'nected y The valve body 14 hasl duplicate passage ways 20 and l21Vtherein arranged with {the openings thereofV at ninety `degree angles.Y

The valve. body i is designdto 'be lmoved Vby an arm 22 provided with aknurled thumb piece 23. The design of the valve body is such that kwhenit is in the position shown Yin Fig. 4, the-supply passage 15 willconnect with the left hand branch of the ltube 10 to till the cylinder lthroughl the left hand pipe 8. At the same-,time the right hand pipe 8will discharge froml the right hand branch ofthe tube 10 into the tube16.

When the valve bodyV is in the position shown in Fig. 5 'all thepassages will be closed, stopping the flow to Aand from the syringecylinders. Vhen the valve body is in the position shown in Fig. 6 theflow is from the supply passage 15 to the right hand end of thecylinder' and the discharge from the left hand end. The flow of theliquid to and from the cylinder l is controlled by a reciprocatingpiston 24 which moves from end to end of the cylinder 1 in a directionaccording to the adjustment of the valve lll. The valve 14 ,isl rockedthrough an angle oi' ninety degrees in order to control its threevoperative adjustments, the position of the Valve being indicated bycharacters 25 disposed adj acent to the arm 22.

On the exposed portion of the cylinder 1',

are two scales 26 developed oppositely from` the ends of the cylinder 1.vThe zero end of the scales 26 are respectively positioned away from theends of the cylinder 1 a distance equal to the thickness of thefpiston24,

and the capacity of the cylinder ahead ot' the piston is the quantity ofthe liquid as indicated on the scale.

In operating the syringe the cylinder is filled from either end and theposition oi?I the valve reversed. The liquid contained in the cylinderahead ofthe piston is discharged vthrough the discharge passage-and theneedle 19.V The amount .of the ,liquid injected is ldetermined bytheiscaleon the` cylinder. After the pistonk has reached the end of itsmovement theposition ofthe valve is reversedand the liquid dischargedfrom the oppositeside vof the piston,.it being understood that .thecylinder.- is i filled behind the pistonv as the liquid is dischargedrointhe cylinder on front thereof.v

Since the syringeis designed. to .he selfilling, andV measuringit mayheoperated yfor injecting serum rapidly, andsince the serumpassesdirectly into. the syringe. from the storage container thevchances of infec tion areYgreatlyavreduced. Furthermore, the syringemay he operated lWithout-loss oct' the: serum las the exact quantityrequired for anl injection may be determined and no leakage or WastageVoccurs either in filling `the syringe ouin the'injecting of the serumfrom the syringe.

I am aware c that .theinvention mayA he the valve case, a dischargepassage from said r valvescase adapted to receive a hypoderimc needle,and a valve .member in said valve case arranged 'to communicate saidiirst named assages selectively with said supply and discharge passages.

2; Aportable syringefor animal inoculation, comprisinga transparentcylinder, op- Vposit'ely ,developed indicating scales arranged adjacent.to and extending longitudinally of said cylinder, a piston in saidcylinder, a valve case, passages from the valve case to opposite ends ofthe cylinder, a supply` passagevadapted `to he connected Withf a sourceof .supply and connected intoithe valve case, a discharge 4Vpassagelfromsaid valve case adapted to receive a hypodermic needle,

`and a .valvememher iny said valve caserar- Y ranged to communicate saidrst named passages selectively `With saidV sup-ply and i dischargepassages. modified in certain particulars Without departing from thespirit and scope .of the JAMES c'.'LoGAi\L

